Is CVE-2015-0231 actively exploited?

CVE-2015-0231 has no public evidence of in-the-wild exploitation as of 2025-04-12.

What is the CVSS score for CVE-2015-0231?

CVE-2015-0231 has a CVSS score of 7.5 (UNKNOWN severity). Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P.

How do I patch CVE-2015-0231?

Patch guidance is available from php security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2015-0231.

Which products are affected by CVE-2015-0231?

84 products: php php, php php, php php, php php, php php, and 79 more.

CVE-2015-0231 - remediation guidance & executive summary

Description

Use-after-free vulnerability in the process_nested_data function in ext/standard/var_unserializer.re in PHP before 5.4.37, 5.5.x before 5.5.21, and 5.6.x before 5.6.5 allows remote attackers to execute arbitrary code via a crafted unserialize call that leverages improper handling of duplicate numerical keys within the serialized properties of an object. NOTE: this vulnerability exists because of an incomplete fix for CVE-2014-8142.

CVSS Metrics

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
Access Vector: network
Access Cmplx: low
Auth: none
Confidentiality: partial
Integrity: partial
Availability: partial
Weaknesses: NVD-CWE-Other

Metadata

Primary Vendor: PHP
Published: 1/27/2015
Last Modified: 4/12/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

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Remediation Guidance

Executive Summary

View on NIST NVD